This is the 114th most frequent Finnish word.
aika
The Finnish word "aika" means "time" or "quite" (depending on context).
Here, 'aika' means 'time', referring to the abstract concept of time.
Aika on rahaa.
Time is money.
In this instance, 'aika' is used as an adverb meaning 'quite' or 'rather', modifying the adjective 'good'.
Se oli aika hyvä elokuva.
It was quite a good movie.
Again, 'aika' refers to 'time', but in the context of time being a healer or a period.